iOS Core Animation: Advanced Techniques

7. Implicit Animations

Do what I mean, not what I say.

Edna Krabappel, The Simpsons

Part I covered just about everything that Core Animation can do, apart from animation. Animation is a pretty significant part of the Core Animation framework. In this chapter, we take a look at how it works. Specifically, we explore implicit animations, which are animations that the framework performs automatically (unless you tell it not to).

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Core Animation is built on the assumption that everything you do onscreen will (or at least may) be animated. Animation is not something that you enable in Core Animation. Animations have to be explicitly turned off; otherwise, they happen all the time.

Whenever you change an animatable property of a CALayer ...